Suppose that A, B, C. and D are sets. Prove or disprove that (A ? B) ? (C ? D) = (A ? C) ? (B ? D).

Solution:Step 1:In this question, Given that A, B, C, and D are sets. Prove or disprove that (A B) (C D) = (A C) (B D).Step 2:Let us consider:Suppose, A be the set of even numbers.A = {2,4,6,8 ……}Suppose, B be the set of odd numbers.B = {1,3,5,7……..}Suppose, C be the set of natural numbers.C= {0,1,2,3,4……..}And D be the set of integer numbers.D = {0,1,2,3,4…….}